{{define "demo01/index.html"}}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    这是index界面，怎么会报错哪

    <form action="/BandingForm" method="get">
      用户名  <input type="text" name="username"><br>
       年龄 <input type="text" name = "age"><br>
        <input type="submit" value ="提交" > <br>
    </form>
</body>
</html>
{{end}}